I' getting a 13.10 error when duplexing only on a hp color laserjet 4730mfp

[JMO123]

I'm getting an error 13.10.00 when duplexing only on a hp color laserjet 4730mfp

[Kazman]

Hi JMO123,

I only know of one thing to try.  If it does not resolve the issue, you need to contact HP Support.

While doing this, be very careful not to touch the fuser as it could be hot.   Be sure to locate where the fuser is at so that you do not accidentally touch it.

• Open the upper right door.
• Open the duplexer cover.
• For orientation: Under the duplexer cover you'll see a metal bar with 2 rollers close to you. 
• Just to the left and right of the rollers is a white lock.
• Try to slide the locks towards you.

If the locks do not move or slide towards you, you will need to contact HP Support. 

If the locks do slide towards you and engage, then close the duplexer cover and the upper right door and attempt to duplex again.  If it still fails, contact HP Support.

[JMO123]

I will try that Thanks Kazman

[pstuk]

Do you have any result for this error

[epifagus]

Diagnostic code 13.10.00 on HP4700dn caused by diverter flap sticking.

My HP Color Laserjet 4700dn (51k pages old) kept jamming on the first duplex page it tried to print every morning, or after a long idle period. Single-sided pages were OK, and duplex pages were OK after I had cleared the first jam every morning. The first sheet of paper always went down as it came out of the duplexer, instead of going up to be pulled back in. The jam left the paper sticking halfway out of the duplexer, printed on one side only.

It turns out that the diverter flap was getting stuck to its plastic stops when the printer sat idle overnight. If you open the top cover of the duplex unit and push down the diverter (black plastic flap) with your finger, it should push down easily and spring back up. Mine was resisting before going down.

The diagnostic menu showed lots of code 13.10.00 errors ("duplex turn around, paper late jam").

Solution: I used a toothbrush to clean the plastic stops that the diverter rests against, and put some WD-40 on the stops and the diverter hinges.